<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<style type="text/css">
	.box1{
		border:1px red solid;
		width: 700px;
		height: 700px;
		margin: 20px auto;
	}
	img{
		margin: 50px;
		border:1px blue solid;
		width: 248px;
		height: 248px;
	}
</style>
<body>
<div class="box1">
	<img src="https://img5.duitang.com/uploads/item/201512/29/20151229204425_Ait5n.jpeg"><img src="https://img5.duitang.com/uploads/item/201512/29/20151229204425_Ait5n.jpeg"><img src="https://img5.duitang.com/uploads/item/201512/29/20151229204425_Ait5n.jpeg"><img src="https://img5.duitang.com/uploads/item/201512/29/20151229204425_Ait5n.jpeg">
</div>
</body>
</html>